Description

Also known as Doctorfish, Lancetfish, Thorntail, Thorntail Fish, Yellowtail Sawtail.

Found in schools, over shallow, rocky reefs, rich in algae growth.
They feed on algae.
Length - 60cm
Depth - 5-35m
Widespread Eastern Central Pacific

Surgeonfish have a blade like spine in the tail that points outwards when bent, unicorns have two hook-like plates along the tail, these are used for defence and are as sharp as a surgeons scalpel, hence the name "Surgeonfish".
Some species are venomous. Ref: https://www.fishbase.se/summary/prionurus-punctatus.html